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<!DOCTYPE html>
<html>

<body>
  <table role="treegrid">
    <tr role="row" aria-level="1" tabindex=-1>
      <td role="gridcell">Cell 1, row 1, level 1</td>
      <td role="gridcell">Cell 2, row 1, level 1</td>
    </tr>
    <tr role="row" aria-level="1" tabindex=-1>
      <td role="gridcell">Cell 1, row 2, level 1</td>
      <td role="gridcell">Cell 2, row 2, level 1</td>
    </tr>
    <tr role="row" aria-level="1" tabindex=-1>
      <td role="gridcell">Cell 1, row 3, level 1</td>
      <td role="gridcell">Cell 2, row 3, level 1</td>
    </tr>
    <tr role="row" aria-level="2" tabindex=-1>
      <td role="gridcell">Cell 1, row 1, level 2</td>
    </tr>
    <tr role="row" aria-level="2" tabindex=-1>
      <td role="gridcell">Cell 1, row 2, level 2</td>
    </tr>
    <tr role="row" aria-level="2" tabindex=-1>
      <td role="gridcell">Cell 1, row 3, level 2</td>
    </tr>
    <tr role="row" aria-level="2" tabindex=-1>
      <td role="gridcell">Cell 1, row 4, level 2</td>
    </tr>
    <tr role="row" aria-level="3" tabindex=-1>
      <td role="gridcell">Cell 1, row 2, level 2</td>
    </tr>
  </table>
  <table role="treegrid">
    <tbody role="rowgroup">
      <tr role="row" aria-level="1" tabindex=-1>
        <td role="gridcell">Cell 1, row 1, rowgroup 1, level 1</td>
      </tr>
      <tr role="row" aria-level="1" tabindex=-1>
        <td role="gridcell">Cell 1, row 2, rowgroup 1, level 1</td>
      </tr>
      <tr role="row" aria-level="1" tabindex=-1>
        <td role="gridcell">Cell 1, row 3, rowgroup 1, level 1</td>
      </tr>
      <tr role="row" aria-level="2" tabindex=-1>
        <td role="gridcell">Cell 1, row 1, rowgroup 1, level 2</td>
      </tr>
      <tr role="row" aria-level="1" tabindex=-1>
        <td role="gridcell">Cell 1, row 1, rowgroup 1, level 1</td>
      </tr>
    </tbody>
    <tbody role="rowgroup">
      <tr role="row" aria-level="1" tabindex=-1>
        <td role="gridcell">Cell 1, row 1, rowgroup 2, level 1</td>
        <td role="gridcell">Cell 2, row 1, rowgroup 2, level 1</td>
      </tr>
      <tr role="row" aria-level="2" tabindex=-1>
        <td role="gridcell">Cell 1, row 1, rowgroup 2, level 2</td>
        <td role="gridcell">Cell 2, row 1, rowgroup 2, level 2</td>
        <td role="gridcell">Cell 3, row 1, rowgroup 2, level 2</td>
      </tr>
    </tbody>
  </table>
  <div role="treegrid">
    <div>
      <div role="rowgroup">
        <div role="row" aria-level="1" tabindex=-1>
          <td role="gridcell">Cell 1, row 1, rowgroup 1, level 1</td>
        </div>
        <div role="row" aria-level="1" tabindex=-1>
          <td role="gridcell">Cell 1, row 2, rowgroup 1, level 1</td>
        </div>
        <div role="row" aria-level="1" tabindex=-1>
          <td role="gridcell">Cell 1, row 3, rowgroup 1, level 1</td>
        </div>
        <div role="row" aria-level="2" tabindex=-1>
          <td role="gridcell">Cell 1, row 1, rowgroup 1, level 2</td>
        </div>
        <div role="row" aria-level="1" tabindex=-1>
          <td role="gridcell">Cell 1, row 1, rowgroup 1, level 1</td>
        </div>
      </div>
      <div role="rowgroup">
        <div role="row" aria-level="1" tabindex=-1>
          <td role="gridcell">Cell 1, row 1, rowgroup 2, level 1</td>
          <td role="gridcell">Cell 2, row 1, rowgroup 2, level 1</td>
        </div>
        <div role="row" aria-level="2" tabindex=-1>
          <td role="gridcell">Cell 1, row 1, rowgroup 2, level 2</td>
          <td role="gridcell">Cell 2, row 1, rowgroup 2, level 2</td>
          <td role="gridcell">Cell 3, row 1, rowgroup 2, level 2</td>
        </div>
      </div>
    </div>
  </div>
</body>

</html>